CN102694268A - Heterogeneous metamaterial - Google Patents
Heterogeneous metamaterial Download PDFInfo
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- CN102694268A CN102694268A CN2011100741166A CN201110074116A CN102694268A CN 102694268 A CN102694268 A CN 102694268A CN 2011100741166 A CN2011100741166 A CN 2011100741166A CN 201110074116 A CN201110074116 A CN 201110074116A CN 102694268 A CN102694268 A CN 102694268A
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Abstract
The invention discloses a heterogeneous metamaterial. The metamaterial comprises a sheet-shape substrate and a plurality of holes arranged in the sheet-shape substrate. The sheet-shape substrate is divided into a plurality of crystal lattices. The each hole is arranged in one crystal lattice so as to form one unit. The heterogeneous metamaterial provided in the invention has the following advantages that: a volume is small; the metamaterial is simple and easy to be realized; cost is low; a wide application prospect is possessed.
Description
Technical field
The present invention relates to ultra field of materials, more particularly, relate to a kind of non-homogeneous ultra material.
Background technology
At present, ultra material (metamaterial) more and more causes people's attention as a kind of material design concept and research forward position, and so-called ultra material is meant artificial composite structure or composite material that some have the not available extraordinary physical property of natural material.Structurally ordered design through on the key physical yardstick of material can break through the restriction of some apparent natural law, thereby obtains to exceed the intrinsic common meta-materials function of nature.
Developing " the ultra material " that so far comprising: " LHM ", photonic crystal, " ultra magnetic material " etc., ultra material character are the intrinsic properties of major decision and constituent material not often, and is decided by artificial structure wherein.
Ultra material influences the index that electromagnetic wave is mainly paid close attention to the following aspects:
1) high-performance.Should have higher performance to electromagnetic influence, near the needed state that influences.
2) low-loss.Has higher energy affect efficient, with the target that realizes saving energy and reduce the cost.
3) size is little.Do not take too much space.
In addition, should be easy to realize that design should be too not complicated to electromagnetic influence, device cost should be not too high.
Ultra material is formed the material behavior that can provide various common materials to have and do not have by media substrate and a plurality of artificial structure that is provided with on the base material.Single artificial structure size is generally less than 1/10 wavelength, and it has electroresponse and/or magnetic response to extra electric field and/or magnetic field, thereby has the effective dielectric constant of showing and/or equivalent permeability, perhaps equivalent refractive index and wave impedance.The effective dielectric constant of artificial structure and equivalent permeability (or equivalent refractive index and wave impedance) can artificially be designed and control by the decision of cell geometry dimensional parameters.And artificial structure can have the anisotropic electromagnetic parameter of artificial design, thereby produces the phenomenon of many novelties, for realizing electromagnetic influence possibility is provided.
Summary of the invention
The technical problem that the present invention will solve is, provide a kind of volume little, simple, be easy to realize and a kind of non-homogeneous ultra material that cost is low influences electromagnetic wave.
The present invention solves first technical scheme that its technical problem adopts: a kind of non-homogeneous ultra material comprises: plate shape substrates and some apertures, and said plate shape substrates is divided into some lattices, and said aperture places said lattice to form a unit.
In non-homogeneous ultra material of the present invention, said ultra material is piled up by a plurality of plate shape substrates and forms, and all is attached with a plurality of apertures on each plate shape substrates, and all apertures form periodic array in the space,
In non-homogeneous ultra material of the present invention, the medium in the said aperture is an air.
In non-homogeneous ultra material of the present invention, said aperture is periodically evenly distribution in described plate shape substrates.
In non-homogeneous ultra material of the present invention, described pattern is the derivative type of " mouth " font or " mouth " font.
In non-homogeneous ultra material of the present invention, said aperture through etching, bore quarter, photoetching, electronics is carved or ion is carved method forms on plate shape substrates.
In non-homogeneous ultra material of the present invention, described plate shape substrates is made by ceramic material, epoxy resin or polytetrafluoroethylene.
In non-homogeneous ultra material of the present invention, be filled with medium in the said aperture, the material of said medium material and said plate shape substrates is inequality.
In non-homogeneous ultra material of the present invention, the effective dielectric constant ε of said unit and equivalent permeability μ are under the situation that plate shape substrates is selected, and shape, design size and/or the aperture arrangement in the space that changes aperture obtains numerical value through emulation.
The electromagnetic ultra material of the influence of embodiment of the present invention has following beneficial effect:
1. volume is little, does not take too much space;
2. simple, be easy to realize, low cost, through ultra material electromagnetic wave is influenced, do not rely on the kind and the shape of equipment;
3. be with a wide range of applications, through ultra material, so can make electromagnetic wave transfer the another one direction to, can focus on electromagnetic wave beam, can be used for making high degree of orientation antenna, realize perfect lens, generate various unusual phenomenons from a direction.
Description of drawings
Fig. 1 is a kind of non-homogeneous metamaterial structure block diagram of the embodiment of the invention;
Fig. 2 is another visual angle of Fig. 1.
The name that each label is corresponding among the figure is called:
10 plate shape substrates, 20 apertures.
Embodiment
By specifying technology contents of the present invention, structural feature, realized purpose and effect, give explanation below in conjunction with execution mode and conjunction with figs. are detailed.
" ultra material " is meant artificial composite structure or the composite material that some have the not available extraordinary physical property of natural material.Structurally ordered design through on the key physical yardstick of material can break through the restriction of some apparent natural law, thereby obtains to exceed the meta-materials function of the intrinsic common character of nature.
Three key characters that " ultra material " is important:
(1) " ultra material " the composite material that normally has novel artificial structure;
(2) " ultra material " has extraordinary physical property (not available in the natural often material);
(3) " ultra material " character intrinsic properties of major decision and constituent material not often, and be decided by artificial structure wherein.
See also Fig. 1 and Fig. 2, in instance one of the present invention, a kind of non-homogeneous ultra material comprises: plate shape substrates 10 and some apertures 20.Fig. 1 is the structural representation of the non-homogeneous ultra material of the embodiment of the invention, and it is actually a plurality of ultra materials edge direction vertical with horizontal plane and cascades, and Fig. 2 is the front view of a ultra material.Plate shape substrates 10 is divided into some lattices, and the notion of " lattice " is from solid-state physics, and " lattice " here is meant in ultra material the size that each aperture 20 is shared." lattice " size depends on the wave frequency of aperture 20 needs responses, usually aperture 20 be of a size of required response electromagnetic wavelength 1/10th.
In order to influence electromagnetic wave more efficiently, ultra material is generally piled up by a plurality of plate shape substrates 10 and forms, and all is drilled with a plurality of apertures 20 on each plate shape substrates 10, and all apertures 20 form periodic array in the space, and the medium in the aperture 20 is an air.Look the needs of actual conditions, also can be filled with medium in the aperture, but rubber, plastics, resin etc., but the material of medium material and said plate shape substrates 10 is inequality.Through filling the different material of other electromagnetic parameter; Position, the quantity of design aperture 20; And the kind of packing material makes the electromagnetic parameter of material distribute can to demonstrate more complicated, abundanter condition, thereby satisfies our requirement to the each side of electromagnetic wave control.
Except the mode of punching, we also can be through the mode of other physics with chemistry, like: etching, bore quarter, photoetching, electronics is carved or ion is carved the combination of materials of different electric magnetic characteristic together.This composite material technology, it can realize the function of non-homogeneous ultra material.
For more clocklike effect and higher efficient, aperture 20 is in described lattice periodically evenly and distributes, and electromagnetic wave is during through thousands of inhomogeneity aperture, and quantitative change causes qualitative change, and additive effect can take place, and produces a lot of unusual phenomenons.
Wherein, some aperture 20 borings according to the electromagnetic wavelength X that will receive, can be divided into some lattices with metal substrate 20 on medium substrate 10, and its length and width can not surpass 1/10 of wavelength X, and some apertures 20 are placed lattice.
Some artificial apertures 20 can be designed the aperture with certain electric magnetic characteristic by manual work through being realized by artificial technology, that is: aperture 20 is designed, and being shaped as of described aperture is square, cylindrical, taper shape or truncated cone-shaped.
The product reaction of the DIELECTRIC CONSTANTS of electromagnetic refractive index material and magnetic permeability μ has relation; When a branch of electromagnetic wave was propagated into other a kind of medium by a kind of medium, electromagnetic wave can reflect, and the big more position deviation angle of refractive index is big more; When the inner refraction index profile of material is non-homogeneous; Electromagnetic wave will through changing the distribution of refractive index in material, can change the electromagnetic wave propagation path to the bigger position deviation of refractive index ratio.
Ultra material can be to electric field or magnetic field, and perhaps both carry out corresponding simultaneously.The DIELECTRIC CONSTANTS of ultra material is depended in the response of electric field, and the magnetic permeability μ of ultra material is depended in the response in magnetic field.Through to the DIELECTRIC CONSTANTS of every bit in the ultra material space and the accurate control of magnetic permeability μ, we can realize through ultra material electromagnetic influence.
Even or the heterogeneous distribution of the electromagnetic parameter of ultra material in the space is one of key character of ultra material.A kind of special shape that evenly be distributed as non-uniform Distribution of electromagnetic parameter in the space, but its concrete property, the characteristic that remains by each cellular construction of arranging in the space determines.Therefore, through the characteristic of each structure of arranging in the design space, just can design the electromagnetic property of whole novel ultra material every bit in the space.This electromagnetic material system will have numerous unusual characteristics, can play special guiding function to electromagnetic wave propagation.
The effective dielectric constant ε of aperture and medium substrate and the system of selection of equivalent permeability μ are:
The first step; Through Computer Simulation and experiment test; Cellular construction (comprising aperture and medium substrate) electromagnetic property within the specific limits to some various geometric is measured; The electromagnetic response curve that measures of storage is confirmed the dielectric constant and the magnetic permeability of various cellular construction and is present in the database;
In second step, the electromagnetic effect of influence is as required confirmed corresponding dielectric constant and magnetic permeability, exists in the database.
In the 3rd step, from database, select the cellular construction of ultra material respective point according to above-mentioned dielectric constant and magnetic permeability.
Those skilled in the art should expect, above-mentioned method is that the method with software program realizes that this software program may reside in hard disk, floppy disk, USB flash disk and the CD.
Among the present invention, the concrete pattern of aperture 20 is not required, because it is as long as it meets our final modulation, conversion, focuses on or disperse and so on effect, promptly feasible.Generally speaking, aperture is periodic array in the space, and preferably, all apertures are inhomogeneity periodic array in the space.Given this, the combination of aperture 20 on ultra material is unlimited.They can be that pattern of apertures is identical, but its design size be different; Also can be that pattern and design size are all inequality.This can be different according to concrete needs; All be the result after the Computer Simulation; That is to say that pattern of apertures, design size and spatial arrangement all obtain through computer is reverse in the whole ultra material; Because the quantity of aperture is huge in the whole ultra material, if therefore forward design can't realize at all.
The present invention utilizes the orderly arrangement of aperture, through the product non-uniform Distribution to the effective dielectric constant ε and the equivalent permeability μ of medium substrate and aperture, thereby reaches the electromagnetic effect of influence.
The electromagnetic ultra material of the influence of embodiment of the present invention has following beneficial effect:
1. volume is little, does not take too much space;
2. simple, be easy to realize, low cost, through ultra material electromagnetic wave is influenced, do not rely on the kind and the shape of electromagnetic wave equipment;
3. be with a wide range of applications; Ultra material passes through electromagnetic influence, so can make electromagnetic wave transfer the another one direction to, can focus on electromagnetic wave beam, can be used for making high degree of orientation antenna, realize perfect lens, generate various unusual phenomenons from a direction.
Combine accompanying drawing that embodiments of the invention are described above; But the present invention is not limited to above-mentioned embodiment, and above-mentioned embodiment only is schematically, rather than restrictive; Those of ordinary skill in the art is under enlightenment of the present invention; Not breaking away under the scope situation that aim of the present invention and claim protect, also can make a lot of forms, these all belong within the protection of the present invention.
Claims (9)
1. a non-homogeneous ultra material is characterized in that, comprising: plate shape substrates and be arranged on a plurality of apertures in the plate shape substrates, and said plate shape substrates is divided into a plurality of lattices, and each aperture places a lattice to form a unit.
2. non-homogeneous ultra material as claimed in claim 1 is characterized in that, said ultra material is piled up by a plurality of plate shape substrates and forms, and all is drilled with a plurality of apertures on each plate shape substrates, and all apertures form periodic array in the space.
3. non-homogeneous ultra material as claimed in claim 1 is characterized in that the medium in the said aperture is an air.
4. non-homogeneous ultra material as claimed in claim 1 is characterized in that, said aperture is periodically evenly distribution on described plate shape substrates.
5. non-homogeneous ultra material as claimed in claim 1 is characterized in that, being shaped as of described aperture is square, cylindrical, taper shape or truncated cone-shaped.
6. non-homogeneous ultra material as claimed in claim 1 is characterized in that, said aperture forms on plate shape substrates through punching, etching, brill quarter, photoetching, electronics is carved or ion is carved method.
7. non-homogeneous ultra material as claimed in claim 1 is characterized in that said plate shape substrates is made by ceramic material, macromolecular material, ferroelectric material, ferrite material or ferromagnetic material.
8. non-homogeneous ultra material as claimed in claim 1 is characterized in that be filled with medium in the said aperture, the material of said medium material and said plate shape substrates is inequality.
9. non-homogeneous ultra material as claimed in claim 1; It is characterized in that; The effective dielectric constant ε of said unit and equivalent permeability μ are under the situation that plate shape substrates is selected, and shape, design size and/or the aperture arrangement in the space that changes aperture obtains numerical value through emulation.
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| CN201110074116.6A CN102694268B (en) | 2011-03-25 | 2011-03-25 | Heterogeneous metamaterial |
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| CN201110074116.6A CN102694268B (en) | 2011-03-25 | 2011-03-25 | Heterogeneous metamaterial |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104916918A (en) * | 2015-04-28 | 2015-09-16 | 电子科技大学 | High-gain horn antenna based on metamaterial loading |
| WO2017161611A1 (en) * | 2016-03-21 | 2017-09-28 | Huawei Technologies Co., Ltd. | Multi-band single feed dielectric resonator antenna (dra) array |
| CN108897087A (en) * | 2018-06-13 | 2018-11-27 | 电子科技大学中山学院 | Nano structure capable of improving asymmetric transmission and preparation method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
| US20100277398A1 (en) * | 2008-03-12 | 2010-11-04 | Tai Anh Lam | Lens for scanning angle enhancement of phased array antennas |
-
2011
- 2011-03-25 CN CN201110074116.6A patent/CN102694268B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100277398A1 (en) * | 2008-03-12 | 2010-11-04 | Tai Anh Lam | Lens for scanning angle enhancement of phased array antennas |
| CN101867094A (en) * | 2010-05-02 | 2010-10-20 | 兰州大学 | Focusing panel antenna |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104916918A (en) * | 2015-04-28 | 2015-09-16 | 电子科技大学 | High-gain horn antenna based on metamaterial loading |
| CN104916918B (en) * | 2015-04-28 | 2018-05-25 | 电子科技大学 | A kind of high-gain horn antenna based on Meta Materials loading |
| WO2017161611A1 (en) * | 2016-03-21 | 2017-09-28 | Huawei Technologies Co., Ltd. | Multi-band single feed dielectric resonator antenna (dra) array |
| US10381735B2 (en) | 2016-03-21 | 2019-08-13 | Huawei Technologies Co., Ltd. | Multi-band single feed dielectric resonator antenna (DRA) array |
| CN108897087A (en) * | 2018-06-13 | 2018-11-27 | 电子科技大学中山学院 | Nano structure capable of improving asymmetric transmission and preparation method thereof |
| CN108897087B (en) * | 2018-06-13 | 2019-08-23 | 电子科技大学中山学院 | Nano structure capable of improving asymmetric transmission and preparation method thereof |
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| CN102694268B (en) | 2015-07-01 |
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